I just upgraded to a phenom x4 955 cpu from an intel e2160 pentium dual core oc'd to 3ghz. But my frame rate has dipped from 60fps to 30fps?! This happens in stalkers SoC/CS and in Neverwinter Nights 2. It does not happen in Unreal Tournament 3 or in Street Fighter 4.(it's possible that because I always use vert sync that in those games the frame rate I get are just off the charts, but I definitely feel the difference in stability between the games in which this issue affects.)

If I hide the GUI (character icons, chat window, etc) in Neverwinter Nights 2 the frame rate returns to normal.

I have tried many dual core optimizations and AMDs CPU drivers as well as old drivers. I am at a loss as to what to do next.

Anyone have any ideas?

I used to have this motherboard with 2gb ram and an e2160 pentium dual core oc'd to 3ghz:Abit IX38 QuadGT